So, here's a question that was asked a lot at the beginning, and which still hasn't been answered as far as I know; maybe some Korean-speaking person here can read the reviews and enlighten us: how do you turn the backlight on and off?
I think back lighting off might be either non existant or dependant on the application. There could be a screen saver or sleep mode in the OS that will turn off the screen after a few minutes of non use but that would still probably turn it on over and over if it's in your pocket or bag unless it has a hold switch which I dont recall seeing.
Well, we all know how rubbish the BLU was with the backlight turned off, so it's really a feature we could live without. Much the better option than mapping it the start/select button, anyway!